mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-22 20:31:14 +00:00
61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
#!/usr/bin/env python
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import sys, os
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from struct import pack as pk, unpack as up
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def atmosphere_target_firmware(major, minor, micro, rev = 0):
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return (major << 24) | (minor << 16) | (micro << 8) | rev
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def align_up(val, algn):
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val += algn - 1
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return val - (val % algn)
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def main(argc, argv):
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if argc != 4:
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print('Usage: %s kernel_ldr.bin kernel.bin output.bin' % argv[0])
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return 1
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with open(argv[1], 'rb') as f:
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kernel_ldr = f.read()
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with open(argv[2], 'rb') as f:
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kernel = f.read()
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kernel_metadata_offset = 4
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assert (kernel_metadata_offset <= len(kernel) - 0x40)
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assert (kernel[kernel_metadata_offset:kernel_metadata_offset + 4] == b'MSS0')
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bss_start, bss_end, kernel_end = up('<III', kernel[kernel_metadata_offset + 0x30:kernel_metadata_offset + 0x3C])
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assert (bss_end >= bss_start)
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assert (bss_end == kernel_end)
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assert (len(kernel) <= kernel_end)
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if len(kernel) < kernel_end:
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kernel += b'\x00' * (kernel_end - len(kernel))
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assert (kernel_end == len(kernel))
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embedded_ini = b''
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try:
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with open('ini.bin', 'rb') as f:
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embedded_ini = f.read()
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except:
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pass
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embedded_ini_offset = align_up(kernel_end, 0x1000)
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embedded_ini_end = embedded_ini_offset + len(embedded_ini) # TODO: Create and embed an INI, eventually.
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kernel_ldr_offset = align_up(embedded_ini_end, 0x1000) + (0x1000 if len(embedded_ini) == 0 else 0)
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kernel_ldr_end = kernel_ldr_offset + len(kernel_ldr)
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mesosphere_end = align_up(kernel_ldr_end, 0x1000)
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with open(argv[3], 'wb') as f:
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f.write(kernel[:kernel_metadata_offset + 4])
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f.write(pk('<QQI', embedded_ini_offset, kernel_ldr_offset, atmosphere_target_firmware(13, 0, 0)))
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f.write(kernel[kernel_metadata_offset + 0x18:])
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f.seek(embedded_ini_offset)
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f.write(embedded_ini)
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f.seek(embedded_ini_end)
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f.seek(kernel_ldr_offset)
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f.write(kernel_ldr)
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f.seek(mesosphere_end)
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f.write(b'\x00'*0x1000)
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return 0
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if __name__ == '__main__':
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sys.exit(main(len(sys.argv), sys.argv))
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